为了优化闸站结合泵站运行时的前池流态,消除不良流态的影响,采用物理模型试验和数值模拟相结合的方法,分析了不良流态发生的原因。提出了多种优化整流方案,研究了其整流效果,构建了由带通水孔的导流墙、Y型导流墩和沿流向导流坎所形成的组合式整流措施。数值模拟发现,带通水孔的导流墙能够有效缩小并上移导流墙后回流区,再借助Y型导流墩和沿流向导流坎的整流作用,能使前池水流均匀顺直地进入进水池,较好地解决了因横向流速产生的偏流问题。研究结果表明,该组合式整流措施使得进水流道进口流速均匀度由86.30%提高到了93.46%,进水池两侧轴向流速偏差度由原来的12.63%下降为3.47%,整流效果显著。研究成果可为类似泵站工程流态改善提供参考。

The aim of this study is to optimize the flow pattern in the forebay of sluice-pump station and eliminate the influence of unfavorable flow pattern. Causes of unfavorable flow pattern were analyzed via physical model test and numerical simulation. The effects of several optimized flow-rectifying schemes were examined, and a combinatorial rectification measure composed of diversion wall with drainage holes, Y-shaped diversion pier and diversion bucket along the flow direction was proposed. Numerical simulation verified that the diversion wall with drainage holes effectively reduced and moved upwards the backflow zone behind the diversion wall; the Y-shaped diversion pier and the diversion bucket along the flow direction helped the water flow in the forebay enter the pool uniformly and directly, hence solving the problem of flow deviation caused by transverse velocity. The proposed optimization scheme enhanced the uniformity of inlet velocity from 86.30% to 93.46%, and reduced the deviation of axial velocity from 12.63% to 3.47%. The research results implied sound effect of flow rectification.

为探寻泵站前池体形优化为节能降耗的贡献，解析泵站前池改造节能降耗机理，以盐环定提水枢纽第三泵站前池为研究对象，数值模拟比较分析其前后流态特征。采用标准k-ε湍流模型方程，利用分离求解器来求解离散方程组，分别对改造前后前池中流态特征进行数值模拟研究。结果表明，泵站前池的体型、尺寸变化对能耗有影响，正向前池中涡流较少，其轴向速度分布均匀度为50.5%，优于侧向进水口均匀度46.9%；分析湍动能和湍动能耗散率数据，正向前池数值优于侧向前池；正向前池能量耗散率随着运行时间，趋于平稳，其能耗率为492.81 W/m²，低于侧向前池能耗率608.13 W/m²，正向前池流态优于侧向前池流态，正向前池节能效果优于侧向前池。

To explore the contribution of the forebay’s shape optimization on energy conservation and consumption in the pumping station and based on the numerical simulation method， the mechanism of energy conservation and consumption reduction of the reconstruction of the pumping station forebay is analyzed， the third pumping station forebay of Yanhuanding Water Station Water Hub is taken as the research object to compare and analyze the flow pattern character before and after reconstruction. The standard k- ε turbulence model equation and the segregated solver are used to solve the discrete equations， and then the flow pattern character of the pumping station forebay before and after transformation is numerically simulated. The results indicate that the changes in the shape and size of the pumping station forebay have impact on the loss of energy consumption. There is less eddy in the front inflow forebay， and the uniformity of the axial velocity distribution is 50.2%， which is better than that of the lateral inlet （46.9%）. By using comparative analysis method， both the turbulent kinetic energy and the turbulent energy dissipation rate in the front inflow forebay are better than that of the lateral inflow forebay. The energy dissipation rate in the forebay tends to be stable with the running time， and the energy consumption of the forebay gets close to 492.81 W/m²， which is lower than that of the lateral inflow forebay （608.13 W/m²）. The energy-saving effect of the front inflow forebay is better than that of the lateral inflow forebay， and the flow pattern of the front inflow forebay is better than that of the lateral inflow forebay.

为解决江苏省扬州市施桥泵站侧向进水前池大范围回流的问题，以施桥翻水站进水建筑物为研究对象，基于雷诺时均N-S方程和RNG k-ε模型，采用CFD软件对侧向进水前池和进水池进行联合数值计算，分析了不同整流措施时前池和进水池的流动特性，提出了若干整流措施并定量分析了流态调控效果，结果表明：无整流措施时，侧向进水泵站2号和6号进水池流态较为紊乱，流线分布不均；通过3个方案整流措施分析，在前池增设底坎时进水池流线分布均匀，流速分布合理，且各水泵机组的进水池进口特征断面轴向流速分布均匀度平均提高了约30%，整流效果显著。研究成果可为类似泵站工程流态改善提供参考。

In order to solve the problem of large-scale backflow in side-inlet forebay of Shiqiao Pumping Station in Yangzhou City， Jiangsu Province， Shiqiao Pumping Station intake structure is taken as the research object based on Reynolds time-averaged equation and RNG k-ε model， CFD software is used for numerical calculation of side-inlet forebay and intake sump. The flow characteristics of forebay and intake sump are analyzed under different rectification measures. Several rectification measures are proposed and the effect of flow pattern control is quantitatively analyzed. The result shows that the flow pattern of 2# and 6# intake sump is comparatively disordered without rectification measures， as the streamline is distributed unevenly. Through an analysis of three rectification measures， the streamline distribution of the intake sump is uniform and the flow velocity distribution is reasonable when the bottom ridge is added to the forebay. Axial velocity distribution uniformity of inlet characteristic section in intake sump is increased by about 30% on average in each pump unit， indicating a significant rectification effect. The research findings serve as a reference for the flow pattern improvement of similar pumping station projects.

泵站侧向进水前池进水流态较差，易产生大范围大尺度的回流区域，导致泵站进水池流态恶化，为了明晰泵站侧向进水前池流态紊乱的问题，以江苏省徐州市境内翟山大沟泵站工程为研究对象，基于雷诺时均N-S方程和RNG k-ε模型，采用CFD技术对有无整流措施情况下该泵站多机组运行时侧向进水前池进行数值模拟的对比分析。结果表明：无整流措施的情况下3台机组的进水池内部均存在大范围的漩涡；通过采用多方案整流措施分析，相比原方案，降低侧向进水前池的纵向底坡且设置弧形导流墙时进水池流速分布均匀，流态最好，且各机组进水喇叭管进口面的平均轴向速度分布均匀度较原方案提高了约10%。

The inlet flow pattern of the lateral inlet forebay of the pumping station is poor， and it is easy to produce a large-scale reflux area， which leads to the deterioration of the flow pattern of the inlet forebay of the pumping station. In order to clarify the problem of the flow pattern disorder of the lateral inlet forebay of the pumping station， the Zhaishan Dagou pumping station project in Xuzhou City， Jiangsu Province is taken as the research object. Based on the Reynolds time-averaged N-S equation and the RNG k-ε model， the CFD technology is used to carry out the comparative analysis of the numerical simulation of the lateral inlet forebay of the pumping station under the operation of multiple units with and without rectification measures. The results show that there is a wide range of vortex in the intake pool of the three units without rectification measures. Through the analysis of multi-scheme rectification measures， compared with the original scheme， the flow velocity distribution of the inlet pool is uniform and the flow pattern is the best when the longitudinal bottom slope of the lateral inlet front pool is reduced and the arc guide wall is set up， and the average axial velocity distribution uniformity of the inlet bell tube inlet surface of each unit increases by about 10% compared with the original scheme. The research results of this paper provide a certain reference for the improvement of the flow pattern of the lateral inflow front pool of the pumping station.

To improve the problem of turbulence in the forebay of the lateral inlet pumping station, a typical lateral inlet pumping station project in Xuzhou, Jiangsu Province, China was taken as the research object. The forebay of the pumping station is a building connecting the river channel and the pumping station into the water tank. Based on the Reynolds-averaged Navier-Stokes (RANS) law and the k-ε turbulence model, the computational fluid dynamics method (CFD) technology compares and analyzes the numerical simulation with or without rectification measures for the forebay of the lateral intake pumping station when multiple units are operating. The three-dimensional model was created by SolidWorks modeling software and the numerical simulation simulated by CFX-ANSYS. To alter the flow pattern in the forebay of the pumping station, various rectification measures were chosen. Internal rectification flow patterns in the forebay under multiple plans, uniformity of flow velocity distribution in the measuring section, and vortex area reduction rates are investigated and compared. Based on the analysis and comparison of numerical simulation results, when the parabolic wall and some rectification piers are set significantly it improves the flow pattern of the forebay of the lateral inlet pumping station. It also makes the flow pattern of the inlet pool better and increases the uniformity of the flow velocity distribution by 8%. Further, it reduced the vortex area by 70%, effectively improving the operating efficiency of the pump. The research results of this paper provide a technical reference for the improvement of the flow pattern in the forebay of the lateral inlet pumping station.

泵站前池扩散角过大易产生不良流态，影响进水池内的水流流态，进而恶化水泵进水条件，降低水泵运行效率，严重时甚至危及泵站安全运行。以某55°大扩散角正向前池为研究对象，采用数值模拟和模型试验相结合的研究方法，通过在前池内设置楔形导流墩以整治流态。研究结果表明：将楔形导流墩设置在前池进口处可以更好地起到分流作用，合理设置组合式对称楔形导流墩能有效提高整个前池的流态改善效果。研究成果对类似泵站的前池整流有一定的参考价值。

A pumping station forebay with excessive diffusion angle is more likely to result in bad flow patterns in the intake pool， which will affect the flow patterns in the inlet pool， worsen the water inlet condition of the pump，reduce the operation efficiency of the pump， and even affect the normal operation of the pumping station. Both numerical simulation and model test methods are adopted to do research on the flow patterns in the inlet pool for a pumping station with diffusion angle of 55° in the forebay by setting diversion pier in the front pool. The results shows that the wedge diversion pier could play a diversion role well in the inlet of the forebay， and reasonable arrangement of the combined symmetrical wedge diversion pier could effectively improve the flow patterns in the forebay.This kind of diversion pier is simple in structure and small in engineering quantity， so it is easy to popularize and apply it.The research results have a certain reference value to rectify the flow patterns in the forebay for similar pumping stations.